Upwelling is a process in which deep, cold water rises toward the surface. The water that rises to the surface is Rich in nutrients, which fertilizes the surface water.
One of the main functions of villi is to absorb nutrients.
The substances in plants and eggs that makes it tightly bound to iron and to be able to limits its own absorption in the body is oxalic acid or phytates. An oxalic acid has the physical appearance of a colorless crystalline solid and it is considered to be an organic compound while the phytates has the ability to bind in dietary materials.
You ever play gta5? right under fort zancudo is an esturary and swampy wetland i did this for point